java批量查詢

① java：sql語句批量執行

public static List<List<Map<String, Object>>> getData() {
答List<List<Map<String, Object>>> data = new LinkedList<List<Map<String, Object>>>();
data.add(SQLHelper.executeQuery("select * from a"));
data.add(SQLHelper.executeQuery("select * from b"));
data.add(SQLHelper.executeQuery("select * from c"));
data.add(SQLHelper.executeQuery("select * from d"));
return data;
}